The commercial bleach concentration is a is a kind of chlorine containing chemical disinfectant. It is widely used in clinic because of its high efficiency, fast, broad spectrum, non-toxic and decontamination ability. It is one of the important tools for hospital disinfection, prevention and control of hospital infection.The broad-spectrum effectiveness of bleach is due to their general chemical reactivity against organic compounds, rather than the selective inhibitory or toxic actions of antibiotics. They irreversibly denature or destroy many proteins, making them extremely versatile disinfectants.